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性成熟前山羊卵母细胞减数分裂进程的研究

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摘要 以卵丘卵母细胞复合体(COCs)为研究对象,研究比较了性成熟前山羊和成年山羊卵母细胞体外核成熟进程及其卵母细胞孤雌发育的能力。结果表明,成年山羊和性成熟前山羊卵母细胞体外成熟过程中减数分裂各时相出现的时间不同。在整个体外成熟培养过程中,性成熟前山羊卵母细胞GV期存在时间较长(7.21 h),大约占成熟时间的1/4,在成熟培养23.96 h后才能进入MⅡ期。对成年羊而言,其卵母细胞GV期存在时间相对较短(2.94 h),占成熟培养时间的1/9,大约在成熟培养20.64 h后进入MⅡ期。成熟培养24 h和27 h,成年羊卵母细胞成熟率差异不显著,但是性成熟前山羊卵母细胞成熟率差异显著(P<0.05)。与成年山羊相比,羔山羊卵母细胞孤雌发育能力较差,可能与其卵母细胞本身成熟缺陷有关。
出处 《江苏农业科学》 CSCD 北大核心 2008年第1期169-172,共4页 Jiangsu Agricultural Sciences
基金 农业部农业结构调整重大技术研究专项(编号:05-07-01B)
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